<?xml version = "1.0" encoding = "utf-8"?>
<sample xmlns="http://demo.org/sample" 
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://demo.org/sample nmtokens_restriction_no_default_value.xsd"
        testatr="a">
</sample>